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<TITLE>JavaScript Source Code 3000:  Calculators:  Area Calculator</TITLE>
<META HTTP-EQUIV="JavaScript Source Code 3000" CONTENT = "no-cache">
<META NAME="date" CONTENT="2000-09-09">
<META NAME="channel" CONTENT="Web Developer">
<META NAME="author" CONTENT="Michael Hundt (mchundt@nglic.com)">
<META NAME="section" CONTENT="Calculators">
<META NAME="description" CONTENT="A simple calculator to determine the area of a square, triangle, rectangle, circle or sphere.">

<SCRIPT LANGUAGE="JavaScript">
<!-- Original:  Michael Hundt (mchundt@nglic.com) -->
<!-- Web Site:  http://www.cinet.net/~mhundt/mystuff.htm -->
<!-- Modified by:  Ronnie T. Moore (JavaScript Source) -->




<!-- Begin
function doArea(num) {
switch(num) {
case 0 : return (""); break;
case 1 : var length = prompt("Please enter the length of your square:", "");
         length = length * length;
         return (length); break;
case 2 : var width = prompt("Please enter the width of the base:", "");
         var height = prompt("Please enter the height of the triangle:", "");
         return (width * height / 2); break;
case 3 : var width = prompt("Please enter the width of your rectangle:", "");
         var height = prompt("Please enter the height of your rectangle:", "");
         return (width * height); break;
case 4 : var radius = prompt("Please enter the radius of the circle: ", "");
         return (Math.PI * Math.pow(radius, 2)); break;
case 5 : var radius = prompt("Please enter the radious of the sphere:", 0);
         return (4 * Math.PI * (Math.pow(radius, 2))); break;
   }
}
//  End -->
</script>
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<FONT COLOR="#006666"><b>Area Calculator</b></font></font>
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<!-- Description --><!--content_start-->
A simple calculator to determine the area of a square, triangle, rectangle, circle or sphere.
<hr>
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<!-- Demonstration -->
<center>
<form name=calcarea>
Find the area of a 
<select name="shape" size="1" onChange="this.form.area.value = doArea(this.selectedIndex);">
<option> ...
<option value="square">Square
<option value="triangle">Triangle
<option value="rectangle">Rectangle
<option value="circle">Circle
<option value="sphere">Sphere
</select>
= <input type=text name=area size=10>
</form>
</center>
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<P>
<a name="source">
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<tr><td BGCOLOR=yellow><font FACE="helvetica,arial,geneva"><b>JavaScript Source Code 3000:  Calculators:  Area Calculator</b>
<p>Simply click inside the window below, use your cursor to highlight the script, and copy (type Control-c or Apple-c) the script into a new file in your text editor (such as Note Pad or Simple Text) and save (Control-s or Apple-s).  The script is yours!!!
<br><br></font></td></tr>
<tr><td BGCOLOR=yellow ALIGN=CENTER>
<form NAME="copy">

<DIV align="center">
<input type=button value="Highlight All" onClick="javascript:this.form.txt.focus();this.form.txt.select();">&nbsp;&nbsp;&nbsp;&nbsp;
<INPUT TYPE="text" NAME="total" VALUE="Script Size:  2.01 KB" size=24>
</DIV>

<textarea NAME="txt" ROWS=20 COLS=75 WRAP=VIRTUAL>

&lt;!-- TWO STEPS TO INSTALL AREA CALCULATOR:

  1.  Copy the coding into the HEAD of your HTML document
  2.  Add the last code into the BODY of your HTML document  --&gt;

&lt;!-- STEP ONE: Paste this code into the HEAD of your HTML document  --&gt;

&lt;HEAD&gt;

&lt;SCRIPT LANGUAGE="JavaScript"&gt;
&lt;!-- Original:  Michael Hundt (mchundt@nglic.com) --&gt;
&lt;!-- Web Site:  http://www.cinet.net/~mhundt/mystuff.htm --&gt;
&lt;!-- Modified by:  Ronnie T. Moore (JavaScript Source) --&gt;

&lt;! &gt;
&lt;! &gt;

&lt;!-- Begin
function doArea(num) {
switch(num) {
case 0 : return (""); break;
case 1 : var length = prompt("Please enter the length of your square:", "");
         length = length * length;
         return (length); break;
case 2 : var width = prompt("Please enter the width of the base:", "");
         var height = prompt("Please enter the height of the triangle:", "");
         return (width * height / 2); break;
case 3 : var width = prompt("Please enter the width of your rectangle:", "");
         var height = prompt("Please enter the height of your rectangle:", "");
         return (width * height); break;
case 4 : var radius = prompt("Please enter the radius of the circle: ", "");
         return (Math.PI * Math.pow(radius, 2)); break;
case 5 : var radius = prompt("Please enter the radious of the sphere:", 0);
         return (4 * Math.PI * (Math.pow(radius, 2))); break;
   }
}
//  End --&gt;
&lt;/script&gt;
&lt;/HEAD&gt;

&lt;!-- STEP TWO: Copy this code into the BODY of your HTML document  --&gt;

&lt;BODY&gt;

&lt;center&gt;
&lt;form name=calcarea&gt;
Find the area of a 
&lt;select name="shape" size="1" onChange="this.form.area.value = doArea(this.selectedIndex);"&gt;
&lt;option&gt; ...
&lt;option value="square"&gt;Square
&lt;option value="triangle"&gt;Triangle
&lt;option value="rectangle"&gt;Rectangle
&lt;option value="circle"&gt;Circle
&lt;option value="sphere"&gt;Sphere
&lt;/select&gt;
= &lt;input type=text name=area size=10&gt;
&lt;/form&gt;
&lt;/center&gt;

 

&lt;!-- Script Size:  2.01 KB --&gt;</textarea><br><font FACE="helvetica,arial,geneva"></font></td></tr>

</table>
</form>
</FONT>
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